diff --git a/SoObjects/SOGo/GNUmakefile.preamble b/SoObjects/SOGo/GNUmakefile.preamble
index 9334ba495..59c36fac2 100644
--- a/SoObjects/SOGo/GNUmakefile.preamble
+++ b/SoObjects/SOGo/GNUmakefile.preamble
@@ -26,6 +26,14 @@ SOGo_LIBRARIES_DEPEND_UPON += \
 	-lNGLdap -lSBJson \
         -lGDLContentStore -lcrypto -lgnustep-base -lobjc -ldl
 
+ifeq ($(HAS_LIBRARY_gnutls),yes)
+ADDITIONAL_CPPFLAGS += -DHAVE_GNUTLS=1
+SOGo_LIBRARIES_DEPEND_UPON += -lgnutls
+else
+ADDITIONAL_CPPFLAGS += -DHAVE_OPENSSL=1
+SOGo_LIBRARIES_DEPEND_UPON += -lcrypto
+endif
+
 ifeq ($(findstring openbsd, $(GNUSTEP_HOST_OS)), openbsd)
 SOGo_LIBRARIES_DEPEND_UPON += -lcrypto
 else